Análise da reutilização de abrasivo no ensaio de desgaste roda de borracha

Abstract

Abrasion is the material loss due the interaction between two surfaces or between two surfaces and its particles. For abrasion to occur, some parameters such as surface roughness, particle shape, particle size and hardness must be considered. These parameters are important for the identification of the type of abrasion that is occurring. Any wear abrasion is an evolutionary process. Beginning with interaction between elements causing small furrows and small detachments of material, then evolving to the interaction between those furrows and increasing the rate of removal of the material due to these interactions. Throughout the abrasion process some parameters can vary, like angularity and size of the particles. There are several types of abrasion tests, among them, the pin on disc, rubber wheel and reciprocation test. This paper performs the test of abrasion to three bodies, know as the test rubber wheel test, which has the ASTM G65 standard as bases. In order to improve the use of research’s supplies, this work presents the reuse of abrasive sand in rubber wheel test, as this sand is one of the most used material for abrasion representation in laboratory. According to ASTM G65 norm, rubber wheel test should be performed with new sand and two more reuses of the same sand, totaling 3 cycles of this supply’s use. As per the results accomplished in this work, it was observed that would be possible to increase the number of abrasive sand reuse giving us 6 cycles of test rubber wheel and still maintain the same good results of the tests carried out following the norm. By increasing the number of abrasive material reuse, there is a yield gain per sandbag of 100%, causing a drop of 50% in the test’s cost, since we can perform more cycles of tests with the same material. Such results open space for abrasive material reuse analysis in other types of abrasion essays.